CN100390913C - Three-layer composite electric contact manufacturing process - Google Patents
Three-layer composite electric contact manufacturing process Download PDFInfo
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- CN100390913C CN100390913C CNB2006100496695A CN200610049669A CN100390913C CN 100390913 C CN100390913 C CN 100390913C CN B2006100496695 A CNB2006100496695 A CN B2006100496695A CN 200610049669 A CN200610049669 A CN 200610049669A CN 100390913 C CN100390913 C CN 100390913C
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000010949 copper Substances 0.000 claims abstract description 77
- 229910052742 iron Inorganic materials 0.000 claims abstract description 73
- 229910052802 copper Inorganic materials 0.000 claims abstract description 70
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000000137 annealing Methods 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 52
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 44
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 43
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 37
- 238000005498 polishing Methods 0.000 claims abstract description 21
- 238000009792 diffusion process Methods 0.000 claims abstract description 20
- 238000005098 hot rolling Methods 0.000 claims abstract description 20
- 238000003466 welding Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000005097 cold rolling Methods 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims abstract description 10
- 238000005554 pickling Methods 0.000 claims abstract description 8
- 238000011282 treatment Methods 0.000 claims abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 36
- 229910052786 argon Inorganic materials 0.000 claims description 20
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 17
- 229910052709 silver Inorganic materials 0.000 claims description 16
- 239000004332 silver Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 4
- 229910001887 tin oxide Inorganic materials 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 85
- 239000000047 product Substances 0.000 description 28
- 229910017727 AgNi Inorganic materials 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 241000156948 Aphantopus hyperantus Species 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- -1 copper iron rare earth Chemical class 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
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Abstract
The present invention relates to a three-layer composite electric contact manufacturing process which comprises the composite connection of three layers composed of a silver alloy ply, a copper ply and an iron ply, wherein a rare earth material layer is added between the copper ply and the iron ply and used as a transition material; the composite connection of each ply comprises the working procedures in order: annealing and softening the iron ply, annealing and planning the copper ply, planning the silver alloy ply, polishing and pickling the silver alloy ply, the copper ply, the rare earth material layer and the iron ply, carrying out the operation of argonarc welding, hot rolling, diffusion treatment, cold rolling, diffusion annealing, checked edge removing, blanking, first annealing, first cleaning and polishing, molding, second annealing, and second cleaning and polishing; the temperature of the hot rolling is from 500 DEG C to 700 DEG C, and after the temperature is maintained for 1.5 to 2 hours, in the process of the hot rolling, the silver alloy ply, the copper ply, the iron ply and the rare earth material layer are formed by rolling for three times according to different amounts of feed. The present invention has the advantages of reasonable technology, stable quality, high bonding strength among composite layers and stable electrical performance; the thickness uniformity of each composite layer is consistent; thus, the qualification rate of products is greatly increased.
Description
Technical field
The present invention relates to a kind of production technology field of appliance controling element.Relate in particular to a kind of adopt between copper layer and the iron layer add the transition material layer with the bond strength that improves interlayer, before hot rolling by the argon shield weldering to avoid the oxidized high reliability of copper, iron and the three-layer composite electric contact manufacturing process of electric performance stablity.Described three-layer composite electric contact is widely used in the thermostat.
Background technology
Electrical contact is the critical elements in the electrical apparatus control system, and it is undertaking the task of connection and breaking current, and its performance directly influences reliability, stability and the accuracy of control system and signal transducting system work; Thereby there is the people to be referred to as meaning " electrical equipment heart ".
At present, the compound electrical contact product of supplying on the market mainly contains: silver, copper two compound electrical contacts and existing three-layer composite electric contact two big classes.
The problem that described silver, copper two compound electrical contact products exist is: because copper is not easy to weld with bimetal leaf, cause that the finished product rate is low, weld strength is low, have a strong impact on useful life.
The problem that described existing three-layer composite electric contact product exists is: because bond strength is not enough between the layer of silver alloy (comprising thin brilliant silver, Agcdo, silver-colored nickel, siller tin oxide alloy), copper, iron and the layer, cause desilverization alloy-layer or iron layer easily.
The main cause that causes described binder course to separate is that silver alloy, copper, iron mechanical performance such as ductility, density, hardness etc. are had any different, and causes internal stress under the situation of being heated because of spread ratios is different, so cause the phenomenon in conjunction with delamination; In addition, copper when existing three compound flaggies heated before hot rolling, iron are as easy as rolling off a log oxidized, also cause bond strength not enough; It is inconsistent that the 3rd reason is that silver alloy (comprising thin brilliant silver, Agcdo, silver-colored nickel, siller tin oxide alloy), copper, each layer thickness of iron are controlled, and causes existing three-layer composite electric contact electrical property instability, directly influences the life-span of the control system of thermostat etc.
Summary of the invention
Purpose of the present invention is exactly the problem that exists in the above technology, and a kind of three-layer composite electric contact manufacturing process that adopts between copper layer and the iron layer bond strength height that adds the transition material layer, electric performance stablity, good reliability is provided.
Three-layer composite electric contact manufacturing process of the present invention is by add the transition material layer between steel layer and iron layer, and is too big with layer performance physical property contrast in the hope of " transition " layer, improves the bond strength between its layer and the layer; And before hot rolling by argon shield weldering sealing silver alloy, copper, each layer of iron, guarantee that each layer do not have air before, avoid copper, iron oxidized; The amount of feeding in the strict controlled rolling process divides to be rolled into sheet material 2-3 time simultaneously, will control the percentage of the amount of feeding at every turn, and is even in the hope of each layer thickness of control sheet material; In order to eliminate between semi-finished product, each layer of finished product, increase annealing treating process in process of production, in the hope of solving the desilverization or problems such as deferrization layer, each composite bed thickness inhomogeneities because of the stress die-cut, that compression moulding causes; Thereby realize the three-layer composite electric contact manufacturing process that electric performance stablity, reliability improve.
The objective of the invention is to have by providing a kind of that following three-layer composite electric contact manufacturing process realizes, it comprises three layers of compound connection that flaggy, copper coin layer, the iron plate layer of silver alloy are formed.Described silver alloy comprises thin brilliant silver, Agcdo, silver-colored nickel, siller tin oxide alloy.Described compound connection is made up of a plurality of operations between each described three layers layer.
Add the rare earth material layer between described copper coin layer and the described iron plate layer as transition material.
A plurality of operations comprise following operation content successively between each of described compound connection layer: the polishing of described iron plate annealing softening-described copper coin annealing planing surface--described silver alloy plate planing surface---described silver alloy plate, described copper coin, described rare earth material layer, described iron plate and pickling-argon shield weldering-hot rolling-DIFFUSION TREATMENT-cold rolling-diffusion annealing-the go raw edges-blanking-cleaning annealing-first time first time, the polishing-moulding-cleaning-polishing annealing-second time second time.
Described rare earth material layer adopts the rare earth material of rhenium element.
Described pure iron plate annealing softening is to anneal in the argon shield stove, and described annealing temperature is 700 ℃-950 ℃, is incubated to be cooled to 150 ℃ ~ 50 ℃ with stove after 4 hours and to come out of the stove, and cools off in air then.
Described copper coin annealing planing surface is 400-600 ℃ of nitrogen protection furnace annealing in vacuum furnace, is incubated the size that is cooled to 50-90 ℃ of come out of the stove back planing two surfaces and four limits after 4 hours with stove.
The polishing of described silver alloy plate, described copper coin, described rare earth material layer, described iron plate is that silver, copper, iron, rare earth plate face are carried out the polishing of coarse sand head after with the chlorohydric acid pickling descale, removes oxide-film, uses rubber sand removal surface again.The pickling of described silver alloy plate, described copper coin, described rare earth material layer, described iron plate is after silver, copper, iron, rare earth plate are cleaned mutually folded face, dry with carbon tetrachloride, silver, copper, iron, rare earth plate are folded together, and four limits become unified neat.
Described argon shield weldering is that folded neat described silver alloy plate, described copper coin, described rare earth material layer, being placed in the special fixture of described iron plate are clamped, press from both sides and put down, and with argon arc welding three limits is welded mutually; Remove clean described three side welds heap point again, and then live not one side of welding with the argon arc welding weldering.
Described hot rolling is that the plate that will carry out the periphery welding enters stove, temperature is about 500 ℃-700 ℃, be incubated and take out the stove hot rolling at once after 1.5～2 hours and become composite plate, divide three roll formings in the described course of hot rolling, the rolling amount of feeding is 20-30% for the first time, the rolling amount of feeding is 50-60% for the second time, all the other are the rolling amount of feeding for the third time.
Described DIFFUSION TREATMENT is that the described composite plate after the hot rolling is put into stove, and temperature is 550 ℃-650 ℃, is incubated after 3 hours and is cooled to 100 ℃～160 ℃ with stove, the air cooling of coming out of the stove; Described cold rolling be that the composite plate after the described DIFFUSION TREATMENT is carried out surface cleaning processing, it is cold rolling to carry out two roads then, the first road cold roling reduction is about to be depressed more than the total amount 50-60%.
Described diffusion annealing is that the composite plate after described cold rolling the finishing is put into box stove, and temperature is 620 ℃, and insulation is 3 hours about described compound thickness of slab 1mm, and insulation is 5 hours about thickness of slab 2mm; When being cooled to 200 ℃-300 ℃ with stove then, the air cooling of coming out of the stove.
Removing raw edges after the described diffusion annealing is the composite plate after the diffusion annealing to be cut off the slitter edge of four limits cracking, and is cut into specification.
Describedly go that the coiled strip check is to be cut into compound flitch of specification behind the raw edges, with specific purpose tool or the manual ringlet volume that is curled into, and then draw and shakeout directly, check that the surface has or not foaming, if any bubbling or layering, iris wipe with marking pen and to represent that this place can not use, should be as waste disposal, this moment, qualified three-layer composite electric contact board making was finished.
Blanking then will be sheared qualified composite board according to the complete blank material of corresponding specification of size of product.
The described annealing first time is that described composite plate blank material is carried out annealing in process, eliminates stress, and annealing temperature is controlled at 300-450 ℃, is incubated 2-3 hour.
The blank material that annealing in process is good carries out cleaning the first time and polishing with ratary mixer, can add 1% brightener.
The blank material that cleaning polishing is good is cold-pressed into the semi-finished product of corresponding specification according to size of product.
Half product with forming carries out annealing in process again, eliminates stress, and annealing temperature is controlled at 300-450 ℃, is incubated 2-3 hour.Carry out then cleaning the second time, polishing.Half product of forming is carried out cleaning polishing with ratary mixer add 1% brightener.Pack again with common oven for drying at last; Oven temperature is controlled at 50-80 ℃.
For fear of copper and the not firm problem points of the direct solder bond intensity of iron, the present invention also iron layer by the three-layer composite electric contact bottom and bimetal leaf or stainless steel substrates welds, and improves weld strength.
Compared with prior art, the invention has the advantages that: 1. technology is reasonable, steady quality, bond strength height between the composite bed, effectively avoid coming off silver layer or iron layer; 2. the thickness evenness unanimity of each composite bed has been guaranteed electric performance stablity; 3. by between copper and iron layer, adding rare earth material, guaranteed that the copper layer combines firmly with the iron layer with rare earth material layer, rare earth material layer, greatly reduces the product disqualification rate, thereby has reduced manufacturing cost as transition material.
Description of drawings
Fig. 1 is three composite board schematic diagrames of the present invention;
Fig. 2 is three composite board blanking semi-finished product schematic diagrames of the present invention;
Fig. 3 is the A-A cutaway view of Fig. 2;
Fig. 4 is a structural representation of the present invention;
Fig. 5 is the A-A structural representation of Fig. 4;
Fig. 6 is an operation process chart of the present invention;
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Fig. 1 to Fig. 6 illustrates an execution mode of three-layer composite electric contact manufacturing process of the present invention.
The work flow of three-layer composite electric contact manufacturing process of the present invention is:
Go the cold rolling 11-diffusion annealing of net air 8-hot rolling 9-diffusion place 10-12-to go the raw edges 13-coiled strip check 14-blanking 15-16-that anneals for the first time to clean, polish the 17-moulding 18-19-that anneals for the second time for the first time and clean for the second time, polish between 1-pure iron plate annealing softening 2-copper coin annealing planing surface 3-silver alloy plate planing surface 4-silver alloy/iron/copper/rare earth polishing 5-silver alloy/copper/iron/rare earth sheet material pickling 6-argon shield weldering 7-four plates; As shown in Figure 6.
The standard and the specific requirement of above-mentioned work flow are:
1-pure iron plate annealing softening pure iron thickness of slab 2mm, the size cutting in accordance with regulations of four limits is placed in the argon shield stove and anneals, and temperature is 700-950 ℃, is incubated and is cooled to 150 ~ 50 ℃ with stove after 4 hours, cools off in the absolutely empty gas of coming out of the stove.
2-copper coin annealing planing surface fine copper thickness of slab 6mm 400-600 ℃ of nitrogen protection furnace annealing in vacuum furnace, be incubated after 4 hours with stove be cooled to 50-90 ℃ come out of the stove after, two sides and four rabbet planes become thick 6mm and four limit given sizes.
3-silver alloy plate planing surface silver plate both sides of plane part established practice provisioning request size, four limits are cut into the specification requirement size.
The polishing of 4-silver alloy/iron/copper/rare earth is carried out the coarse sand head with silver, copper, iron, rare earth plate face after with the chlorohydric acid pickling descale and is polished, and the removal oxide-film is used rubber sand removal surface again.
After 5-silver alloy/copper/iron/rare earth sheet material pickling was cleaned silver, copper, iron, rare earth plate mutually folded face, dried with carbon tetrachloride, silver, copper, iron, rare earth plate is folded neat, and it is neat that four limits become unification.
6-argon shield weldering will fold that neat silver, copper, iron, rare earth plate are placed in the special fixture and clamp, folder is flat, make between plate and the plate and have not a particle of the gap, and four limits are neat, with argon arc welding three limit silver-bearing copper iron rare earth plates welded mutually then, can not have the weldering of leakage and rosin joint to occur.After welding, carry out scrutiny, find welding with suspicion, repair welding in time.
After going net air three side welds to live between 7-four plates, remove clean three side welds heap point, on milling train, carry out random pressure rolling, the mutual face of four laminates is tightly folded and tight, and then lived not one side of welding with the argon arc welding weldering.
The plate that the 8-hot rolling will be carried out the periphery welding enters stove, and temperature is about 500-700 ℃, is incubated and takes out the stove hot rolling at once after 1.5～2 hours, and drafts should be got more than the 20-30%.
The composite plate of 9-DIFFUSION TREATMENT after with hot rolling put into stove, and temperature is 550-650 ℃, is incubated and is cooled to 100～160 ℃ with stove after 3 hours, the air cooling of coming out of the stove.
10-is cold rolling to carry out surface cleaning processing (polishing) with the composite plate after the DIFFUSION TREATMENT, and cold rolling then, the first road cold roling reduction is about more than the 50-60%, rolls by product specification requirement (20-30%) for the second time.
11-diffusion annealing is put into box stove with cold rolling good composite plate, and temperature is 620 ℃, and insulation is 3 hours about thickness of slab 1mm, and insulation is 5 hours about thickness of slab 2mm.When being cooled to 200-300 ℃ with stove then, the air cooling of coming out of the stove.
Composite plate after 12-goes raw edges with diffusion annealing cuts off the slitter edge of four limits cracking, and is cut into specification.
The check of 13-coiled strip will be cut into compound flitch of specification, with specific purpose tool or the manual ringlet volume that is curled into, and then draw and shakeout directly, check that the surface has or not foaming, if any bubbling or layering, iris wipe with marking pen and to represent that this place can not use, should be as waste disposal, this moment, qualified three-layer composite electric contact board making was finished; As shown in Figure 1.
The 14-blanking will be sheared qualified composite board according to the complete blank material of corresponding specification of size of product; As shown in Figure 2.
15-anneals for the first time the blank material is carried out annealing in process, eliminates stress, and annealing temperature is controlled at 300-450 ℃, is incubated 2-3 hour.
16-cleans, polishes the blank material that annealing in process is good for the first time and carries out cleaning polishing (adding 1% brightener) with ratary mixer.
The blank material that the 17-moulding is good with cleaning polishing is cold-pressed into the semi-finished product of corresponding specification according to size of product; Shown in Fig. 2,3.
Half product that 18-anneals for the second time with forming carries out annealing in process, eliminates stress, and annealing temperature is controlled at 300-450 ℃, is incubated 2-3 hour.
Half product that 19-cleans for the second time, polishes forming carries out cleaning polishing (adding 1% brightener) with ratary mixer.Pack (oven temperature is controlled at 50-80 ℃) again with common oven for drying at last.
Major control point is in the work flow of three-layer composite electric contact manufacturing process of the present invention:
1. silver alloy, copper, iron, when rare earth sheet material is superimposed, each sheet material stack wants neat, otherwise the copper in the middle of will making in the operation of rolling, the fracture of rare earth sheet material produce into product defects;
2. by argon shield weldering welding silver alloy, copper, iron, rare earth sheet material, can prevent that copper, iron between each layer from welding oxidized in air, produce the oxide skin phenomenon, can guarantee that the rare earth sheet material of fine copper, pure iron and cleaning directly welds, improve its bond strength;
3. in course of hot rolling, divide three times roll forming, first amount of feeding is that 20-30%, second amount of feeding are that 50-60%, first amount of feeding are 20-30%; Secondary amount of feeding must guarantee at 50-60%, otherwise material will scrap, and do not allow to drop into subsequent production, if drop into subsequent production, will produce a large amount of three-layer composite electric contact product desilverizations or deferrization phenomenon.
When 4. processing AgCdO/Cu/F matter e three-layer composite electric contact product, the temperature of heating, annealing temperature are controlled between 360-420 ℃, avoid CdO to separate out, otherwise will cause desilverization alloy-layer phenomenon; Processing AgNi/Cu/Fe, AgSnO
2During/Cu/Fe three-layer composite electric contact product, the temperature of heating, annealing temperature are controlled between 400-480 ℃.
The effect that three-layer composite electric contact manufacturing process of the present invention obtains is: by add rare earth sheet material between copper and iron plate, to improve the processing equipment performance between transition copper and the iron plate; When processing AgCdO/Cu/Fe three-layer composite electric contact product, heating-up temperature, annealing temperature are controlled between 360-420 ℃, have avoided that CdO is clear to be gone out; Solve copper, the oxidized problem of iron by the argon shield weldering; When die-cut, compression moulding, eliminate the stress that produces because of machining by annealing in process.
By above PROCESS FOR TREATMENT, effectively improve copper coin and iron plate bond strength, avoid the desilverization of three-layer composite electric contact product, deferrization phenomenon to take place.In the operation of rolling, control each rolling amount of feeding, the thickness evenness of control layers of material in the hope of the three-layer composite electric contact product resistance unanimity of producing, adds the Bi of different content simultaneously in silver alloy
2O
3, WO
3, In
2O
3, MoO
3, TeO
2, Sb
2O
3(concrete content adds according to customer demand), the electrical property of raising product satisfies client's needs.
The present invention is fit to the following three-layer composite electric contact preparation of product of forming:
AgCdO/Cu/Fe (Agcdo/copper/iron), AgNi/Cu/Fe (silver-colored nickel/copper/iron), AgSnO
2/ Cu/Fe (silver tin/copper oxide/iron).
AgCdO, AgNi, AgSnO
2The Bi that can also contain 0.2%-4% in the alloy
2O
3(bismuth oxide), WO
3(tungsten oxide), In
2O
3(indium oxide), MoO
3(molybdenum oxide), TeO
2In (tellurium oxide) one or more.Particularity of the present invention is by adding rare earth material (rhenium) as transition material between copper and iron layer, this has guaranteed that the copper layer combines firmly with the iron layer with rare earth material layer, rare earth material layer, has avoided manifesting of the easy deferrization of present of home make three-layer composite electric contact product; Oxidized in the course of processing by argon shield weldering control copper, iron before the plate hot rolling process; At the each amount of feeding when rolling of control sheet material, so that the thickness evenness of control three-layer composite electric contact product silver alloy, copper, iron layer improves three-layer composite electric contact product electric performance stablity; Add semi-finished product, finished product annealing process simultaneously, in the hope of eliminating because of stress die-cut, that compression moulding produces.
Three-layer composite electric contact product of the present invention is widely used in the temperature controller. As the contact material of temperature controller, it has Following characteristics: the three-layer composite electric contact solder side is the pure iron material, and with small salient point, shown in Fig. 4,5; In the hope of increasing Add welding performance, can make the ferrous alloy firm welding such as electrical contact and bimetal leaf and stainless steel substrates; Combination between the composite bed The intensity height, avoid coming off silver layer or iron layer; The thickness evenness of each composite bed is consistent, guarantees electric performance stablity.
Claims (10)
1. three-layer composite electric contact manufacturing process, it comprises three layers of compound connection that the flaggy, copper coin layer, iron plate layer of silver alloy are formed, described silver alloy comprises thin brilliant silver, Agcdo, silver-colored nickel, siller tin oxide alloy, described compound connection is made up of a plurality of operations between each described three layers layer, it is characterized in that: add rare earth material layer (3) between described copper coin layer (2) and the described iron plate layer (4) as transition material; A plurality of operations are by the iron plate annealing softening that forms iron plate layer (4) between each described three layers layer--the copper coin annealing planing surface that forms copper coin layer (2)--forms the silver alloy plate planing surface of silver alloy flaggy (1)---form the silver alloy plate of silver alloy flaggy (1); form the copper coin of copper coin layer (2); form the rare earth plate of rare earth material layer (3); the polishing of the iron plate of formation iron plate layer (4) and pickling-argon shield weldering-hot rolling-DIFFUSION TREATMENT-cold rolling-diffusion annealing-go clean the raw edges-blanking-annealing-first time first time; polishing-moulding-cleaning-polishing annealing-the second time second time is formed.
2. a kind of three-layer composite electric contact manufacturing process according to claim 1 is characterized in that: described rare earth material layer (3) adopts the rare earth material of rhenium element.
3. a kind of three-layer composite electric contact manufacturing process according to claim 1; it is characterized in that: described iron plate annealing softening is to anneal in the argon shield stove; described annealing temperature is 700 ℃-950 ℃, is incubated to be cooled to 150 ℃ ~ 50 ℃ with stove after 4 hours and to come out of the stove, and cools off in air then.
4. a kind of three-layer composite electric contact manufacturing process according to claim 1; it is characterized in that: described copper coin annealing planing surface is 400-600 ℃ of nitrogen protection furnace annealing in vacuum furnace, is incubated the size that is cooled to 50-90 ℃ of come out of the stove back planing two surfaces and four limits after 4 hours with stove.
5. according to claim 1 or 2 or 3 or 4 described a kind of three-layer composite electric contact manufacturing process, it is characterized in that: the polishing of described silver alloy plate, described copper coin, described rare earth plate, described iron plate is that silver alloy plate, copper coin, iron plate, rare earth plate face are carried out the polishing of coarse sand head after with the chlorohydric acid pickling descale, remove oxide-film, use rubber sand removal surface again; The pickling of described silver alloy plate, described copper coin, described rare earth plate, described iron plate is after silver alloy plate, copper coin, iron plate, rare earth plate are cleaned mutually folded face, dry with carbon tetrachloride, silver alloy plate, copper coin, iron plate, rare earth plate are folded together, and four limits become unified neat.
6. a kind of three-layer composite electric contact manufacturing process according to claim 1, it is characterized in that: described argon shield weldering is folded neat described silver alloy plate, described copper coin, described rare earth plate, described iron plate to be placed in the special fixture clamp, press from both sides and put down, and with argon arc welding three limits is welded mutually; Remove clean described three side welds heap point again, and then live not one side of welding with the argon arc welding weldering.
7. a kind of three-layer composite electric contact manufacturing process according to claim 1, it is characterized in that: described hot rolling is that the plate that will carry out the periphery welding enters stove, temperature is 500 ℃-700 ℃, be incubated and take out the stove hot rolling at once after 1.5～2 hours and become composite plate, divide three roll formings in the described course of hot rolling, the rolling amount of feeding is 20-30% for the first time, the rolling amount of feeding is 50-60% for the second time, all the other are the rolling amount of feeding for the third time.
8. a kind of three-layer composite electric contact manufacturing process according to claim 1, it is characterized in that: described DIFFUSION TREATMENT is that the described composite plate after the hot rolling is put into stove, temperature is 550 ℃-650 ℃, is incubated after 3 hours and is cooled to 100 ℃～160 ℃ with stove, the air cooling of coming out of the stove; Described cold rolling be that the composite plate after the described DIFFUSION TREATMENT is carried out surface cleaning processing, it is cold rolling to carry out two roads then, the first road cold roling reduction is about depresses total amount more than 50%.
9. a kind of three-layer composite electric contact manufacturing process according to claim 1, it is characterized in that: described diffusion annealing is that the composite plate after described cold rolling the finishing is put into box stove, temperature is 620 ℃, and insulation is 3 hours about described compound thickness of slab 1mm, and insulation is 5 hours about thickness of slab 2mm; When being cooled to 200 ℃-300 ℃ with stove then, the air cooling of coming out of the stove.
10. a kind of three-layer composite electric contact manufacturing process according to claim 1 is characterized in that: the described annealing first time is that described composite plate blank material is carried out annealing in process, eliminates stress, and annealing temperature is controlled at 300-450 ℃, is incubated 2-3 hour; Described second time of annealing is that the described composite plate semi-finished product with forming carry out annealing in process, eliminates stress, and annealing temperature is controlled at 300-450 ℃, is incubated 2-3 hour.
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| CN100437858C (en) * | 2006-11-24 | 2008-11-26 | 林羽锦 | Machining technique of silver/copper/iron composite strip material |
| CN100437857C (en) * | 2006-11-24 | 2008-11-26 | 林羽锦 | Machining technique of silver/copper double composite strip material |
| CN100466131C (en) * | 2007-01-11 | 2009-03-04 | 温州宏丰电工合金有限公司 | Production of triple-layer composite cold-rolling welded rivet contact |
| CN101241811B (en) * | 2008-02-25 | 2011-01-26 | 重庆川仪自动化股份有限公司 | Making method for temperature controller heteromorphism section electric contact material |
| CN101350255B (en) * | 2008-08-12 | 2010-06-09 | 浙江亚通金属陶瓷有限公司 | Cuprum chromium-cuprum composite contact material and manufacturing method thereof |
| CN103060582B (en) * | 2013-01-03 | 2015-03-25 | 宁波金点电子有限公司 | Production method of silver cadmium oxide copper and iron alloy |
| CN103722041B (en) * | 2013-12-26 | 2017-01-11 | 浙江科扬新材料科技有限公司 | Manufacturing equipment and method of compound silver belt |
| CN103773312B (en) * | 2013-12-27 | 2015-05-27 | 福达合金材料股份有限公司 | Mixed powder for rapidly removing forged burrs of rivet electrical contact and application method thereof |
| CN107761059B (en) * | 2017-09-27 | 2020-01-31 | 南京工业大学 | Silver alloy coating on surface of electrical alloy part, preparation method of silver alloy coating and electrical alloy part |
| CN107591257B (en) * | 2017-10-20 | 2020-11-10 | 温州宏丰电工合金股份有限公司 | Silver-based multilayer composite electric contact material and preparation method thereof |
| CN108356609A (en) * | 2018-03-06 | 2018-08-03 | 浙江润成合金材料科技有限公司 | Electrical contact deburring cleaning polishing technique |
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